By night or by day?

In Ligthroom, among a pretty big library (20k picture), I'd like to find a quick way of knowing (or estimating) which one has been taken by night (and which one by day). So it would be wonderful I could choose "Time" or "Hour" like I can choose "Date" or any other Metadata.My final goal is to know which lens or camera I use mostly by night, which one by day.